1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
11 24731-2:2010, is supported to enable declarations of functions from that
12 TR. Note that not all functions from that TR are supported by the GNU C
15 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
16 18661-1:2014, is supported to enable declarations of functions and macros
17 from that TS. Note that most features from that TS are not supported by
20 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
21 18661-4:2015, is supported to enable declarations of functions and macros
22 from that TS. Note that most features from that TS are not supported by
25 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
26 means that in a future release, the macros “major”, “minor”, and “makedev”
27 will only be available from <sys/sysmacros.h>.
29 These macros are not part of POSIX nor XSI, and their names frequently
30 collide with user code; see for instance glibc bug 19239 and Red Hat bug
31 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
32 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
35 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
36 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
37 the femode_t type and the FE_DFL_MODE macro.
39 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
40 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
41 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
42 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
43 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
44 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
45 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
46 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
47 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
48 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
49 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
52 * New <math.h> features are added from TS 18661-1:2014:
54 - Comparison macros: iseqsig.
56 - Classification macros: iscanonical, issubnormal, iszero.
58 - Total order functions: totalorder, totalorderf, totalorderl,
59 totalordermag, totalordermagf, totalordermagl.
61 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
62 for the Linux quota interface which predates kernel version 2.4.22 has
65 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
66 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
67 “no-ip6-dotint” had already been the default, and support for the
68 “ip6-dotint” option was removed from the Internet in 2006.
70 * The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT
71 flag from <resolv.h> have been removed. The option relied on a
72 backwards-incompatible DNS extension which was never deployed on the
75 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG defined
76 in the <resolv.h> header file have been deprecated. They were already
79 * DNSSEC-related declarations and definitions have been removed from the
80 <arpa/nameser.h> header file, and libresolv will no longer attempt to
81 decode the data part of DNSSEC record types. Previous versions of glibc
82 only implemented minimal support for the previous version of DNSSEC, which
83 is incompatible with the currently deployed version.
85 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
86 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
87 <arpa/nameser.h> header file because the distinction between RR types and
88 meta-RR types is not officially standardized, subject to revision, and
89 thus not suitable for encoding in a macro.
91 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
92 and rhook members of the res_state type in <resolv.h> have been removed.
93 The glibc stub resolver did not support these hooks, but the header file
96 * For multi-arch support it is recommended to use a GCC which has
97 been built with support for GNU indirect functions. This ensures
98 that correct debugging information is generated for functions
99 selected by IFUNC resolvers. This support can either be enabled by
100 configuring GCC with '--enable-gnu-indirect-function', or by
101 enabling it by default by setting 'default_gnu_indirect_function'
102 variable for a particular architecture in the GCC source file
105 Security related changes:
107 On ARM EABI (32-bit), generating a backtrace for execution contexts which
108 have been created with makecontext could fail to terminate due to a
109 missing .cantunwind annotation. This has been observed to lead to a hang
110 (denial of service) in some Go applications compiled with gccgo. Reported
111 by Andreas Schwab. (CVE-2016-6323)
113 The following bugs are resolved with this release:
115 [The release manager will add the list generated by
116 scripts/list-fixed-bugs.py just before the release.]
120 * The minimum Linux kernel version that this version of the GNU C Library
121 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
122 kernel version 2.6.32 or later suffices (on architectures that already
123 required kernel versions more recent than 3.2, those requirements remain
124 unchanged). Linux 3.2 or later kernel headers are required on all
127 * The pap_AN locale has been deleted. This has been deprecated for a long
128 time. It has been replaced by pap_AW & pap_CW, both of which have long
129 been included in previous releases.
131 * The readdir_r and readdir64_r functions have been deprecated. It is
132 recommended to use readdir and readdir64 instead.
134 * The type “union wait” has been removed. It was deprecated in the early
135 1990s and never part of POSIX. Application code should use the int type
136 instead of “union wait”.
138 * A new NSS action is added to facilitate large distributed system
139 administration. The action, MERGE, allows remote user stores like LDAP
140 to be merged into local user stores like /etc/groups in order to provide
141 easy to use, updated, and managed sets of merged credentials. The new
142 action can be used by configuring it in /etc/nsswitch.conf:
143 group: files [SUCCESS=merge] nis
144 Implemented by Stephen Gallagher (Red Hat).
146 * The deprecated __malloc_initialize_hook variable has been removed from the
149 * The long unused localedef --old-style option has been removed. It hasn't
150 done anything in over 16 years. Scripts using this option can safely
153 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
154 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
155 return the next representable value in the direction of positive infinity
156 and the nextdown functions return the next representable value in the
157 direction of negative infinity. These are currently enabled as GNU
160 Security related changes:
162 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
163 could result in a stack overflow when getnetbyname was called with an
164 overly long name. (CVE-2016-3075)
166 * Previously, getaddrinfo copied large amounts of address data to the stack,
167 even after the fix for CVE-2013-4458 has been applied, potentially
168 resulting in a stack overflow. getaddrinfo now uses a heap allocation
169 instead. Reported by Michael Petlan. (CVE-2016-3706)
171 * The glob function suffered from a stack-based buffer overflow when it was
172 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
173 Reported by Alexander Cherepanov. (CVE-2016-1234)
175 * The Sun RPC UDP client could exhaust all available stack space when
176 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
177 alloca plugin for GCC. (CVE-2016-4429)
179 * The IPv6 name server management code in libresolv could result in a memory
180 leak for each thread which is created, performs a failing naming lookup,
181 and exits. Over time, this could result in a denial of service due to
182 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
184 The following bugs are resolved with this release:
186 [1170] localedata: ne_NP: update Nepali locale definition file
187 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
189 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
190 [6796] math: fdim() does not set errno on overflow
191 [10354] libc: posix_spawn should use vfork() in more cases than presently
192 [11213] localedata: localedata: add copyright disclaimer to locale files
193 [12143] localedata: chr_US: new Cherokee locale
194 [12450] localedata: sgs_LT: new locale
195 [12676] localedata: ln_CD: new locale
196 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
198 [13304] math: fma, fmaf, fmal produce wrong results
199 [14259] build: --localedir arg to configure is ignored
200 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
201 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
202 [14934] localedata: es_CL: wrong first weekday chilean locale
203 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
205 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
207 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
208 [15368] nptl: raise() is not async-signal-safe
209 [15479] math: ceil, floor, round and trunc raise inexact exception
210 [15578] localedata: kk_KZ: various updates
211 [16003] localedata: pap_AN: punt old locale
212 [16137] localedata: iw_IL: punt old locale
213 [16190] localedata: eo: new esperanto locale
214 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
215 [16742] malloc: race condition: pthread_atfork() called before first
216 malloc() results in unexpected locking behaviour/deadlocks
217 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
219 [16983] localedata: postal_fmt does not allow %l and %n modifiers
220 [17565] localedata: pt_PT: wrong (work-)week start
221 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
222 [17950] build: Build fails with -msse
223 [18205] localedata: be_BY*: wrong first_weekday and first_workday
224 [18433] libc: posix_spawn does not return correctly upon failure to
226 [18453] localedata: charmaps/IBM875: incorrect codes
227 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
229 [18896] localedata: he_IL: improvements for currency
230 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
232 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
234 [19056] libc: Deprecate readdir_r
235 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
237 [19198] localedata: nl_NL: small improvements for Dutch locales
238 [19257] network: Per-thread memory leak in __res_vinit with IPv6
239 nameservers (CVE-2016-5417)
240 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
242 [19400] locale: Language missing in "iso-639.def", trivial fix in
244 [19431] malloc: Deadlock between fflush, getdelim, and fork
245 [19505] libc: Incorrect file descriptor validity checks in
246 posix_spawn_file_actions_add{open,close,dup2}
247 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
249 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
250 `intl/{gettextP,loadinfo}.h'
251 [19534] libc: execle, execlp may use malloc
252 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
253 [19573] network: res_nclose and __res_maybe_init disagree about name
254 server initialization, breaking Hesiod
255 [19575] localedata: Status of GB18030 tables
256 [19581] localedata: sr_* date_fmt string contains additional newline
257 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
259 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
260 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
261 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
262 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
264 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
266 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
268 [19610] dynamic-link: ldconfig -X removes stale symbolic links
269 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
270 [19633] locale: strfmon_l applies global locale to number formatting
271 [19642] network: Memory leak in getnameinfo
272 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
273 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
275 [19654] math: [x86_64] Need testcase for BZ #19590 fix
276 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
278 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
279 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
281 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
283 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
285 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
286 pointers and lengths in error-case.
287 [19727] locale: Converting from/to UTF-xx with iconv() does not always
288 report errors on UTF-16 surrogates values.
289 [19755] nscd: nscd assertion failure in gc
290 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
291 [19759] libc: mempcpy shouldn't be inlined
292 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
293 [19765] libc: s390 needs an optimized mempcpy
294 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
295 NAME_MAX limit assumption (CVE-2016-1234)
296 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
297 [19787] network: Missing and incorrect truncation checks in getnameinfo
298 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
300 [19791] network: Assertion failure in res_query.c with un-connectable name
302 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
303 [19822] math: libm.so install clobbers old version
304 [19825] network: resolv: send_vc can return uninitialized data in second
305 response to getaddrinfo
306 [19830] network: nss_dns: should check RDATA length against buffer length
307 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
308 confronted with A/AAAA records of invalid size
309 [19837] nss: nss_db: No retries for some long lines with a larger buffer
310 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
311 [19853] stdio: Printing IBM long double in decimal with high precision is
313 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
314 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
315 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
317 [19865] network: Assertion failure or memory leak in
318 _nss_dns_getcanonname_r
319 [19868] network: nss_dns: netent code does not skip over non-PTR records
320 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
322 [19881] string: Improve x86-64 memset
323 [19907] string: Incorrect memcpy tests
324 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
326 [19925] libc: termios.h XCASE namespace
327 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
328 [19929] libc: limits.h NL_NMAX namespace
329 [19931] stdio: Memory leak in vfprintf
330 [19957] libc: clone(CLONE_VM) access invalid parent memory
331 [19963] localedata: en_IL: New locale
332 [19989] stdio: stdio.h cuserid namespace
333 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
335 [19996] locale: langinfo.h nl_langinfo_l namespace
336 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
337 [20010] network: getaddrinfo: Stack overflow in hostent translation
339 [20012] stdio: libio: fmemopen append mode failure
340 [20014] stdio: stdio.h namespace for pre-threads POSIX
341 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
342 [20023] libc: fcntl.h timespec namespace
343 [20024] math: [x86_64] vectorized sincos trashes the stack
344 [20031] network: nss_hesiod: Heap overflow in get_txt_records
345 [20041] time: sys/time.h timespec namespace
346 [20043] libc: unistd.h missing cuserid for UNIX98 and before
347 [20044] libc: unistd.h missing pthread_atfork for UNIX98
348 [20051] libc: ttyslot in wrong header under wrong conditions
349 [20054] libc: gethostname not declared for XPG4
350 [20055] libc: termios.h missing tcgetsid for XPG4
351 [20072] dynamic-link: x86 init_cpu_features is called twice in static
353 [20073] libc: sys/stat.h fchmod namespace
354 [20074] libc: stdlib.h rand_r namespace
355 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
356 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
358 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
359 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
361 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
362 [20119] libc: Wrong mask for processors level type from CPUID
363 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
364 AS not supporting AVX512
365 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
367 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
368 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
370 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
371 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
372 [20178] libc: posix_spawn{p} should not call exit
373 [20191] stdio: libio: vtables hardening
374 [20195] string: FMA4 detection requires CPUID execution with register
376 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
377 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
379 [20212] math: acos (sNaN) returns sNaN
380 [20213] math: asin (sNaN) returns sNaN
381 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
382 [20218] math: [i386] asinhl (sNaN) returns sNaN
383 [20219] math: [i386] atanhl (sNaN) returns sNaN
384 [20222] stdio: fopencookie: Mangle function pointers
385 [20224] math: [i386] cbrtl (sNaN) returns sNaN
386 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
387 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
389 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
390 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
391 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
392 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
393 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
394 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
395 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
396 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
397 [20240] math: modf (sNaN) returns sNaN
398 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
399 [20250] math: frexp (sNaN) returns sNaN
400 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
401 [20255] math: [i386] fdim, fdimf return with excess range and precision /
403 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
404 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
405 subscript is below array bounds [-Werror=array-bounds]
406 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
407 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
409 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
410 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
412 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
414 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
415 [20316] localedata: id_ID: Februari instead of Pebruari
416 [20327] string: POWER8 strcasecmp returns incorrect result
417 [20347] math: Failure: Test: j0_downward (0xap+0)
418 [20348] libc: FAIL: misc/tst-preadvwritev64
419 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
420 [20350] libc: There is no test for p{read,write}64
421 [20357] math: Incorrect cos result for 1.5174239687223976
422 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
426 * Unicode 8.0.0 Support: Character encoding, character type info, and
427 transliteration tables are all updated to Unicode 8.0.0, using new
428 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
429 These updates cause user visible changes, such as the fixes for bugs
430 89, 16061, and 18568.
432 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
433 kernel-internal CPU set size. This means that requests that change the
434 CPU affinity which failed before (for example, an all-ones CPU mask) will
435 now succeed. Applications that need to determine the effective CPU
436 affinities need to call sched_getaffinity or pthread_getaffinity_np after
437 setting it because the kernel can adjust it (and the previous size check
438 would not detect this in the majority of cases).
440 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
441 the following new symbols are used: fts64_children, fts64_close,
442 fts64_open, fts64_read and fts64_set.
444 * getaddrinfo now detects certain invalid responses on an internal netlink
445 socket. If such responses are received, an affected process will
446 terminate with an error message of "Unexpected error <number> on netlink
447 descriptor <number>" or "Unexpected netlink response of size <number> on
448 descriptor <number>". The most likely cause for these errors is a
449 multi-threaded application which erroneously closes and reuses the netlink
450 file descriptor while it is used by getaddrinfo.
452 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
453 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
454 unnecessary serialization of memory allocation requests across threads.
455 The defect is now corrected. Users should see a substantial increase in
456 the concurent throughput of allocation requests for applications which
457 trigger this bug. Affected applications typically create and
458 destroy threads frequently. (Bug 19048 was reported and analyzed by
461 * There is now a --disable-timezone-tools configure option for disabling the
462 building and installing of the timezone related utilities (zic, zdump, and
463 tzselect). This is useful for people who build the timezone data and code
464 independent of the GNU C Library.
466 * The obsolete header <regexp.h> has been removed. Programs that require
467 this header must be updated to use <regex.h> instead.
469 * The obsolete functions bdflush, create_module, get_kernel_syms,
470 query_module and uselib are no longer available to newly linked binaries;
471 the header <sys/kdaemon.h> has been removed. These functions and header
472 were specific to systems using the Linux kernel and could not usefully be
473 used with the GNU C Library on systems with version 2.6 or later of the
476 * Optimized string, wcsmbs and memory functions for IBM z13.
477 Implemented by Stefan Liebler.
479 * Newly linked programs that define a variable called signgam will no longer
480 have it set by the lgamma, lgammaf and lgammal functions. Programs that
481 require signgam to be set by those functions must ensure that they use the
482 variable provided by the GNU C Library and declared in <math.h>, without
483 defining their own copy.
485 * The minimum GCC version that can be used to build this version of the GNU
486 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
487 still be used to compile programs using the GNU C Library.
489 Security related changes:
491 * An out-of-bounds value in a broken-out struct tm argument to strftime no
492 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
494 * The LD_POINTER_GUARD environment variable can no longer be used to disable
495 the pointer guard feature. It is always enabled. Previously,
496 LD_POINTER_GUARD could be used to disable security hardening in binaries
497 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
500 * An integer overflow in hcreate and hcreate_r could lead to an
501 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
503 * The catopen function no longer has unbounded stack usage. Reported by
506 * The nan, nanf and nanl functions no longer have unbounded stack usage
507 depending on the length of the string passed as an argument to the
508 functions. Reported by Joseph Myers. (CVE-2014-9761)
510 * A stack-based buffer overflow was found in libresolv when invoked from
511 libnss_dns, allowing specially crafted DNS responses to seize control
512 of execution flow in the DNS client. The buffer overflow occurs in
513 the functions send_dg (send datagram) and send_vc (send TCP) for the
514 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
515 family. The use of AF_UNSPEC triggers the low-level resolver code to
516 send out two parallel queries for A and AAAA. A mismanagement of the
517 buffers used for those queries could result in the response of a query
518 writing beyond the alloca allocated buffer created by
519 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
520 the overflow. Thanks to the Google Security Team and Red Hat for
521 reporting the security impact of this issue, and Robert Holiday of
522 Ciena for reporting the related bug 18665. (CVE-2015-7547)
524 The following bugs are resolved with this release:
526 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
527 [887] math: Math library function "logb" and "nextafter" inconsistent
528 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
529 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
530 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
531 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
533 [4404] localedata: German translation of "Alarm clock" is misleading
534 [6799] math: nextafter() and nexttoward() doen't set errno on
535 overflow/underflow errors
536 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
538 [10432] nis: _nss_nis_setnetgrent assertion failure
539 [11460] libc: fts has no LFS support
540 [12926] network: getaddrinfo()/make_request() may spin forever
541 [13065] nptl: Race condition in pthread barriers
542 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
543 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
545 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
546 [14912] libc: Rename non-installed bits/*.h headers
547 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
548 [15367] math: Let gcc use __builtin_isinf
549 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
550 [15421] math: lgamma wrongly sets signgam for ISO C
551 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
552 FE_INVALID with argument out of range
553 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
555 [15786] dynamic-link: ifunc resolver functions can smash function
557 [15918] math: Unnecessary check for equality in hypotf()
558 [16061] localedata: Review / update transliteration data
559 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
561 [16141] time: strptime %z offset restriction
562 [16171] math: drem should be alias of remainder
563 [16296] math: fegetround is pure?
564 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
565 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
567 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
568 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
570 [16422] math: [powerpc] math-float, math-double failing llrint tests with
571 "Exception "Inexact" set" on ppc32
572 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
573 [16517] math: Missing underflow exception from tanf/tan/tanl
574 [16519] math: Missing underflow exception from sinhf
575 [16520] math: Missing underflow exception from tanhf
576 [16521] math: Missing underflow exception from exp2
577 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
579 [16734] stdio: fopen calls mmap to allocate its buffer
580 [16961] math: nan function incorrect handling of bad sequences
581 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
582 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
583 [16985] locale: localedef: confusing error message when opening output
585 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
586 [17197] locale: Redundant shift character in iconv conversion output at
588 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
589 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
590 [17250] dynamic-link: static linking breaks nss loading
591 (getaddrinfo/getpwnam/etc...)
592 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
594 [17441] math: isnan() should use __builtin_isnan() in GCC
595 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
596 (related to lock elision)
597 [17787] manual: Exponent on page 324 of the PDF ends prematurely
598 [17886] time: strptime should be able to parse "Z" as a timezone with %z
599 [17887] time: strptime should be able to parse "+01:00" style timezones
600 [17905] libc: catopen() Multiple unbounded stack allocations
602 [18084] libc: backtrace (..., 0) dumps core on x86
603 [18086] libc: nice() sets errno to 0 on success
604 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
605 is too large (CVE-2015-8778)
606 [18251] dynamic-link: SONAME missing when audit modules provides path
607 [18265] libc: add attributes for wchar string and memory functions
608 [18370] math: csqrt missing underflows
609 [18421] libc: [hppa] read-only segment has dynamic relocations
610 [18472] libc: Obsolete syscall wrappers should be compat symbols
611 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
612 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
613 [18525] localedata: Remove locale timezone information
614 [18560] libc: [powerpc] spurious bits/ipc.h definitions
615 [18568] localedata: Update locale data to Unicode 8.0
616 [18589] locale: sort-test.sh fails at random
617 [18595] math: ctan, ctanh missing underflows
618 [18604] libc: assert macro-expands its argument
619 [18610] math: S390: fetestexcept() reports any exception if DXC-code
620 contains a vector instruction exception.
621 [18611] math: j1, jn missing errno setting on underflow
622 [18618] localedata: sync Chechen locale definitions with other *_RU
624 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
625 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
626 [18665] network: In send_dg, the recvfrom function is NOT always using the
627 buffer size of a newly created buffer (CVE-2015-7547)
628 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
630 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
632 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
633 [18699] math: tilegx cproj() for various complex infinities does not yield
635 [18724] libc: Harden put*ent functions against data injection
636 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
637 [18755] build: build errors with -DNDEBUG
638 [18757] stdio: fmemopen fails to set errno on failure
639 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
641 [18781] libc: openat64 lacks O_LARGEFILE
642 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
643 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
644 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
645 [18790] math: [ldbl-128ibm] tanhl inaccurate
646 [18795] libc: stpncpy fortification misses buffer lengths that are
648 [18796] build: build fails for --disable-mathvec
649 [18803] math: hypot missing underflows
650 [18820] stdio: fmemopen may leak memory on failure
651 [18823] math: csqrt spurious underflows
652 [18824] math: fma spurious underflows
653 [18825] math: pow missing underflows
654 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
655 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
656 [18870] build: sem_open.c fails to compile with missing symbol
658 [18872] stdio: Fix memory leak in printf_positional
659 [18873] libc: posix_fallocate overflow check ineffective
660 [18875] math: Excess precision leads incorrect libm
661 [18877] libc: arm: mmap offset regression
662 [18887] libc: memory corruption when using getmntent on blank lines
663 [18918] localedata: hu_HU: change time to HH:MM:SS format
664 [18921] libc: Regression: extraneous stat() and fstat() performed by
666 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
667 binaries (CVE-2015-8777)
668 [18951] math: tgamma missing underflows
669 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
671 [18953] localedata: lt_LT: change currency symbol to the euro
672 [18956] math: powf inaccuracy
673 [18961] math: [i386] exp missing underflows
674 [18966] math: [i386] exp10 missing underflows
675 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
676 [18969] build: multiple string test failures due to missing locale
678 [18970] libc: Reference of pthread_setcancelstate in libc.a
679 [18977] math: float / long double Bessel functions not in XSI POSIX
680 [18980] math: i386 libm functions return with excess range and precision
681 [18981] math: i386 scalb*, ldexp return with excess range and precision
682 [18982] stdio: va_list and vprintf
683 [18985] time: Passing out of range data to strftime() causes a segfault
685 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
686 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
687 [19012] locale: iconv_open leaks memory on error path
688 [19016] math: clog, clog10 inaccuracy
689 [19018] nptl: Mangle function pointers in tls_dtor_list
690 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
691 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
692 [19048] malloc: malloc: arena free list can become cyclic, increasing
694 [19049] math: [powerpc] erfc incorrect zero sign
695 [19050] math: [powerpc] log* incorrect zero sign
696 [19058] math: [x86_64] Link fail with -fopenmp and -flto
697 [19059] math: nexttoward overflow incorrect in non-default rounding modes
698 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
699 [19074] network: Data race in _res_hconf_reorder_addrs
700 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
701 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
702 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
704 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
706 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
707 [19086] manual: posix_fallocate64 documented argument order is wrong.
708 [19088] math: lround, llround missing exceptions close to overflow
710 [19094] math: lrint, llrint missing exceptions close to overflow threshold
711 [19095] math: dbl-64 lrint incorrect for 64-bit long
712 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
713 [19124] dynamic-link: ld.so failed to build with older assmebler
714 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
715 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
716 [19134] math: [powerpc32] lround, lroundf spurious exceptions
717 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
718 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
719 pthread_setaffinity_np
720 [19156] math: [ldbl-128] j0l spurious underflows
721 [19164] nptl: tst-getcpu fails with many possible CPUs
722 [19168] math: math/test-ildoubl and math/test-ldouble failure
723 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
724 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
726 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
727 (FE_NOMASK_ENV) do not clear SSE exceptions
728 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
729 _int_new_arena/reused_arena
730 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
731 [19201] math: dbl-64 remainder incorrect sign of zero result
732 [19205] math: bits/math-finite.h conditions do not match math.h and
734 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
735 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
736 for C99-based standards
737 [19212] libc: features.h not -Wundef clean
738 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
740 [19214] libc: Family and model identification for AMD CPU's are incorrect.
741 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
742 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
744 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
746 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
748 [19242] libc: strtol incorrect in Turkish locales
749 [19243] malloc: reused_arena can pick an arena on the free list, leading
750 to an assertion failure and reference count corruption
751 [19253] time: tzset() ineffective when temporary TZ did not include DST
753 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
754 [19270] math: [hppa] Shared libm missing __isnanl
755 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
756 MAP_HUGETLB and MAP_STACK defines
757 [19313] nptl: Wrong __cpu_mask for x32
758 [19347] libc: grantpt: try to force a specific gid even without pt_chown
759 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
760 [19350] math: [ldbl-128ibm] sinhl spurious overflows
761 [19351] math: [ldbl-128ibm] logl inaccurate near 1
762 [19363] time: x32: times() return value wrongly truncates/sign extends
764 [19367] dynamic-link: Improve branch prediction on Silvermont
765 [19369] network: Default domain name not reset by res_ninit when "search"
766 / "domain" entry is removed from resolv.conf
767 [19375] math: powerpc: incorrect results for POWER7 logb with negative
769 [19385] localedata: bg_BG: time separator should be colon, not comma
770 [19408] libc: linux personality syscall wrapper may erroneously return an
771 error on 32-bit architectures
772 [19415] libc: dladdr returns wrong names on hppa
773 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
774 IBM905, IBM907, and IBM909
775 [19439] math: Unix98 isinf and isnan functions conflict with C++11
776 [19443] build: build failures with -DDEBUG
777 [19451] build: Make check fails on test-double-vlen2
778 [19462] libc: Glibc failed to build with -Os
779 [19465] math: Wrong code with -Os
780 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
782 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
784 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
785 [19486] math: S390: Math tests fail with "Exception Inexact set".
786 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
787 [19550] libc: [mips] mmap negative offset handling inconsistent with other
789 [19590] math: Fail to build shared objects that use libmvec.so functions.
793 * The following bugs are resolved with this release:
795 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
796 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
797 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
798 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
799 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
800 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
801 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
802 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
803 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
804 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
805 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
806 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
807 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
808 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
809 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
810 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
811 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
812 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
813 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
814 18657, 18676, 18694, 18696, 18887.
816 * Cache information can be queried via sysconf() function on s390 e.g. with
817 _SC_LEVEL1_ICACHE_SIZE as argument.
819 * A buffer overflow in gethostbyname_r and related functions performing DNS
820 requests has been fixed. If the NSS functions were called with a
821 misaligned buffer, the buffer length change due to pointer alignment was
822 not taken into account. This could result in application crashes or,
823 potentially arbitrary code execution, using crafted, but syntactically
824 valid DNS responses. (CVE-2015-1781)
826 * The time zone file parser has been made more robust against crafted time
827 zone files, avoiding heap buffer overflows related to the processing of
828 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
829 large time zone data files. Overly long time zone specifiers in the TZ
830 variable no longer result in stack overflows and crashes.
832 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
833 for LD and GD on x86 and x86-64, has been implemented. You will need
834 binutils-2.24 or later to enable this optimization.
836 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
837 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
838 Hat). These updates cause user visible changes, such as the fix for bug
841 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
842 and getXXbyYY NSS calls for the same database, causing a denial-of-service
843 condition in some applications.
845 * Added vector math library named libmvec with the following vectorized x86_64
846 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
848 The library can be disabled with --disable-mathvec. Use of the functions is
849 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
850 Shared library libmvec.so is linked in as needed when using -lm (no need to
851 specify -lmvec explicitly for not static builds).
852 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
854 * A new fmemopen implementation has been added with the goal of POSIX
855 compliance. The new implementation fixes the following long-standing
856 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
857 old implementation is still present for use be by existing binaries.
859 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
860 releases. It has been fixed to match 2.19 and older, but binaries built
861 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
863 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
864 Contributed by Roland McGrath (Google).
866 * The header <regexp.h> is deprecated, and will be removed in a future
867 release. Use of this header will trigger a deprecation warning.
868 Application developers should update their code to use <regex.h> instead.
870 This header was formerly part of SUS, but was deprecated in 1994 and
871 removed from the standard in 2001. Also, the glibc implementation
872 leaks memory. See BZ#18681 for more details.
876 * The following bugs are resolved with this release:
878 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
879 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
880 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
881 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
882 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
883 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
884 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
885 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
886 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
887 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
890 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
891 too little memory for the to-be-scanned arguments and overflow the
892 allocated buffer. The implementation now correctly computes the required
893 buffer size when using malloc, and switches to malloc from alloca as
896 * A new semaphore algorithm has been implemented in generic C code for all
897 machines. Previous custom assembly implementations of semaphore were
898 difficult to reason about or ensure that they were safe. The new version
899 of semaphore supports machines with 64-bit or 32-bit atomic operations.
900 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
901 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
903 * Port to Altera Nios II has been contributed by Mentor Graphics.
905 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
906 implementations for powerpc64/powerpc64le.
907 Implemented by Adhemerval Zanella (IBM).
909 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
910 and powerpc64le. This may improve lock scaling of existing programs on
911 HTM capable systems. The lock elision code is only enabled with
912 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
913 powerpc will issue a transaction abort on every syscall to avoid side
914 effects being visible outside transactions.
916 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
917 AArch64. Contributed by ARM Ltd.
919 * i386 memcpy functions optimized with SSE2 unaligned load/store.
921 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
922 under certain input conditions resulting in the execution of a shell for
923 command substitution when the application did not request it. The
924 implementation now checks WRDE_NOCMD immediately before executing the
925 shell and returns the error WRDE_CMDSUB as expected.
927 * CVE-2012-3406 printf-style functions could run into a stack overflow when
928 processing format strings with a large number of format specifiers.
930 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
931 infinite loop if the DNS response contained a PTR record of an unexpected
934 * The minimum GCC version that can be used to build this version of the GNU
935 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
936 still be used to compile programs using the GNU C Library.
938 * The GNU C Library is now built with -Werror by default. This can be
939 disabled by configuring with --disable-werror.
941 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
943 * The obsolete sigvec function has been removed. This was the original
944 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
945 programs have been using instead for about 25 years. Of course, ABI
946 compatibility for old binaries using sigvec remains intact.
948 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
949 with newer versions of bison.
951 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
952 The original MIPS o32 hard-float ABI requires an FPU where double-precision
953 registers overlay two consecutive single-precision registers. MIPS32R2
954 introduced a new FPU mode (FR=1) where double-precision registers extend the
955 corresponding single-precision registers which is incompatible with the
956 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
957 require the use of FR=1 making a transition necessary. New o32 ABI
958 extensions enable users to migrate over time from the original o32 ABI
959 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
960 tracks the ABI of any loaded object and verifies that new objects are
961 compatible. Mode transitions will also be requested as required and
962 unsupportable objects will be rejected. The ABI checks include both soft and
963 hard float ABIs for o32, n32 and n64.
965 GCC 5 with GNU binutils 2.25 onwards:
966 It is strongly recommended that all o32 system libraries are built using the
967 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
968 with the original and all new o32 ABI extensions. Configure a MIPS GCC
969 compiler using --with-fp-32=xx to set this by default.
973 * The following bugs are resolved with this release:
975 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
976 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
977 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
978 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
979 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
980 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
981 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
982 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
983 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
984 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
985 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
986 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
987 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
988 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
989 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
991 * Reverted change of ABI data structures for s390 and s390x:
992 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
993 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
994 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
995 are preserved pointing straight to the same implementation as the old ones.
996 Given that, new callers will simply provide a too-big buffer to these
997 functions. Any applications/libraries out there that embed jmp_buf or
998 ucontext_t in an ABI-relevant data structure that have already been rebuilt
999 against 2.19 headers will have to rebuilt again. This is necessary in any
1000 case to revert the breakage in their ABI caused by the glibc change.
1002 * Support for file description locks is added to systems running the
1003 Linux kernel. The standard file locking interfaces are extended to
1004 operate on file descriptions, not file descriptors, via the use of
1005 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1006 are associated with an open file instead of a process.
1008 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1010 * The minimum Linux kernel version that this version of the GNU C Library
1011 can be used with is 2.6.32.
1013 * Running the testsuite no longer terminates as soon as a test fails.
1014 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1015 with PASS or FAIL lines for individual tests. A summary of the results is
1016 printed, including a list of failing lists, and "make check" exits with
1017 error status if there were any unexpected failures. "make check
1018 stop-on-test-failure=y" may be used to keep the old behavior.
1020 * The am33 port, which had not worked for several years, has been removed
1023 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1024 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1025 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1026 conflicted with POSIX (support for which was removed in 2.19), the
1027 interfaces those macros enabled remain available when compiling with
1028 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1029 test macros defined.
1031 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1033 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1034 This may improve lock scaling of existing programs on TX capable systems.
1035 The lock elision code is only built with --enable-lock-elision=yes and
1036 then requires a GCC version supporting the TX builtins. With lock elision
1037 default mutexes are elided via __builtin_tbegin, if the cpu supports
1038 transactions. By default lock elision is not enabled and the elision code
1041 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1042 copy the path argument. This allowed programs to cause posix_spawn to
1043 deference a dangling pointer, or use an unexpected pathname argument if
1044 the string was modified after the posix_spawn_file_actions_addopen
1047 * All supported architectures now use the main glibc sysdeps directory
1048 instead of some being in a separate "ports" directory (which was
1049 distributed separately before glibc 2.17).
1051 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1052 On configurations that support it (all Linux configurations), it's now
1053 used regardless of the --enable-add-ons switch to configure. It is no
1054 longer possible to build such configurations without pthreads support.
1056 * Locale names, including those obtained from environment variables (LANG
1057 and the LC_* variables), are more tightly checked for proper syntax.
1058 setlocale will now fail (with EINVAL) for locale names that are overly
1059 long, contain slashes without starting with a slash, or contain ".." path
1060 components. (CVE-2014-0475) Previously, some valid locale names were
1061 silently replaced with the "C" locale when running in AT_SECURE mode
1062 (e.g., in a SUID program). This is no longer necessary because of the
1065 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1066 with application code using Intel MPX instructions. (With all previous
1067 versions, the MPX register state could be clobbered when making calls
1068 into or out of a shared library.) Note that while the new dynamic
1069 linker is compatible with all known x86 hardware whether or not it
1070 supports Intel MPX, some x86 instruction-set emulators might fail to
1071 handle the new instruction encodings. This is known to affect Valgrind
1072 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1073 release), and might affect other tools that do instruction emulation.
1075 * Support for loadable gconv transliteration modules has been removed.
1076 The support for transliteration modules has been non-functional for
1077 over a decade, and the removal is prompted by security defects. The
1078 normal gconv conversion modules are still supported. Transliteration
1079 with //TRANSLIT is still possible, and the //IGNORE specifier
1080 continues to be supported. (CVE-2014-5119)
1082 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1083 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1084 resulting a denial-of-service security vulnerability in applications which
1085 use functions related to iconv. (CVE-2014-6040)
1089 * The following bugs are resolved with this release:
1091 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1092 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1093 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1094 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1095 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1096 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1097 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1098 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1099 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1100 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1101 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1102 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1103 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1104 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1105 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1106 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1107 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1108 16431, 16453, 16474, 16506, 16510, 16529
1110 * Slovenian translations for glibc messages have been contributed by the
1111 Translation Project's Slovenian team of translators.
1113 * The public headers no longer use __unused nor __block. This change is to
1114 support compiling programs that are derived from BSD sources and use
1115 __unused internally, and to support compiling with Clang's -fblock
1116 extension which uses __block.
1118 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1119 large collation sequences to optimize multiple passes. This cache
1120 computation may overflow for large collation sequences and may cause a
1121 stack or buffer overflow. This is now fixed to use a slower algorithm
1122 which does not use a cache if there is an integer overflow.
1124 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1125 rules for large collation sequences to optimize multiple passes and falls
1126 back to alloca if malloc fails, resulting in a possible stack overflow.
1127 The implementation now falls back to an uncached collation sequence lookup
1130 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1131 initialized for static applications resulting in the security feature
1132 being disabled. The pointer guard is now correctly initialized to a
1133 random value for static applications. Existing static applications need
1134 to be recompiled to take advantage of the fix (bug 15754).
1136 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1137 to the d_name member of struct dirent, or omit the terminating NUL
1138 character. (Bugzilla #14699).
1140 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1141 aligned_alloc functions could allocate too few bytes or corrupt the
1142 heap when passed very large allocation size values (Bugzilla #15855,
1145 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1146 for AF_INET6 has been fixed (Bugzilla #16072).
1148 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1149 pap_CW, quz_PE, the_NP.
1151 * Substantially revised locales: gd_GB, ht_HT
1153 * The LC_ADDRESS field was updated to support country_car for almost all
1156 * ISO 1427 definitions were updated.
1158 * ISO 3166 definitions were updated.
1160 * The localedef utility now supports --big-endian and --little-endian
1161 command-line options to generate locales for a different system from that
1162 for which the C library was built.
1164 * Binary locale files now only depend on the endianness of the system for
1165 which they are generated and not on other properties of that system. As a
1166 consequence, binary files generated with new localedef may be incompatible
1167 with old versions of the GNU C Library, and binary files generated with
1168 old localedef may be incompatible with this version of the GNU C Library,
1169 in the following circumstances:
1171 + Locale files may be incompatible on m68k systems.
1173 + Locale archive files (but not separate files for individual locales) may
1174 be incompatible on systems where plain "char" is signed.
1176 * The configure option --disable-versioning has been removed. Builds with
1177 --disable-versioning had not worked for several years.
1179 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1180 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1182 * SystemTap probes for malloc have been introduced.
1184 * SystemTap probes for slow multiple precision fallback paths of
1185 transcendental functions have been introduced.
1187 * Support for powerpc64le has been added.
1189 * The soft-float powerpc port now supports e500 processors.
1191 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1193 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1194 set of header declarations that are enabled by default, even when other
1195 feature test macros or compiler options such as -std=c99 would otherwise
1196 disable some of those declarations.
1198 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1199 conflict with POSIX. The libbsd-compat library (which was a dummy library
1200 that did nothing) has also been removed.
1202 * Preliminary documentation about Multi-Thread, Async-Signal and
1203 Async-Cancel Safety has been added.
1205 * Change of ABI data structures for s390 and s390x:
1206 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1207 allow for future hardware extensions. All library functions that accept or
1208 return these structures were versioned in order to provide backwards
1209 compatibility with existing code. However, not all cases can be handled
1210 with interface versioning. If an application embeds either structure into
1211 another structure and that structure is passed to another compilation unit
1212 which expects the newer larger-sized object then any access to the new
1213 fields will result in undefined behaviour. Similarly any access to fields
1214 that were moved by the enlarging of the structures will cause undefined
1215 behaviour. To fix the undefined behaviour all objects that are part of the
1216 final in-memory image must agree on the size of structures, and this may
1217 require recompilation.
1221 * The following bugs are resolved with this release:
1223 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1224 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1225 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1226 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1227 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1228 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1229 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1230 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1231 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1232 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1233 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1234 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1235 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1238 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1239 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1240 Distributions can re-enable building and using pt_chown via the new configure
1241 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1242 considerable security risks and should only be used if the distribution
1243 understands and accepts the risks.
1245 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1248 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1249 fixed (Bugzilla #15330).
1251 * Add support for calling C++11 thread_local object destructors on thread
1252 and program exit. This needs compiler support for offloading C++11
1253 destructor calls to glibc.
1255 * Improved worst case performance of libm functions with double inputs and
1258 * Support for priority inherited mutexes in pthread condition variables on
1259 non-x86 architectures.
1261 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1263 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1265 * Optimized string functions for ARM. Implemented by Will Newton and
1268 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1270 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1273 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1274 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1276 * Added a benchmark framework to track performance of functions in glibc.
1278 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1279 It is based on draft TS 18661 and currently enabled as a GNU extension.
1281 * On Linux, the clock function now uses the clock_gettime system call
1282 for improved precision, rather than old times system call.
1284 * Added support for version-3 tz format files. This is needed when using
1285 the tz database release 2013e or later, and affects a few unusual cases --
1286 currently only TZ='America/Godthab' for time stamps after 2037.
1288 * Added new API functions pthread_getattr_default_np and
1289 pthread_setattr_default_np to get and set the default pthread
1290 attributes of a process.
1292 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1293 This may improve lock scaling of existing programs on TSX capable systems.
1294 When the --enable-lock-elision=yes parameter is specified at configure
1295 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1298 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1299 availability). Implemented by Ryan S. Arnold.
1301 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1305 * The following bugs are resolved with this release:
1307 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1308 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1309 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1310 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1311 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1312 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1313 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1314 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1315 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1316 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1317 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1318 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1319 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1320 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1321 14879, 14889, 14893, 14898, 14914.
1323 * Optimization of memcpy for MIPS.
1325 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1326 EMFILE has been fixed (Bugzilla #14889).
1328 * The add-on ports collection is now distributed in the "ports" subdirectory
1329 of the main GNU C Library distribution, rather than separately.
1331 * Port to ARM AArch64 contributed by Linaro.
1333 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1334 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1336 Implemented by Andreas Krebbel.
1338 * The new function secure_getenv allows secure access to the environment,
1339 returning NULL if running in a SUID/SGID process. This function replaces
1340 the internal function __secure_getenv.
1342 * SystemTap static probes have been added into the dynamic linker.
1343 Implemented by Gary Benson.
1345 * Optimizations of string functions strstr, strcasestr and memmem.
1346 Implemented by Maxim Kuvyrkov.
1348 * The minimum Linux kernel version that this version of the GNU C Library
1349 can be used with is 2.6.16.
1351 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1352 powerpc POWER7. Implemented by Will Schmidt.
1354 * New configure option --disable-nscd builds the C library such that it
1355 never attempts to contact the Name Service Caching Daemon (nscd).
1356 New configure option --disable-build-nscd avoids building nscd itself;
1357 this is the default if --disable-nscd is used.
1359 * Improved support for cross-compilation, including cross-testing and
1360 bootstrap builds without a previously built glibc.
1362 * Several testsuite tests are now able to test multiple IFUNC variants of an
1363 interface, rather than just testing the one that would be chooen by
1366 * New configure options --with-bugurl and --with-pkgversion, for
1367 distributors to use to embed their bug-reporting and package version
1368 information in --help and --version output.
1370 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1371 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1372 allows creation of chroots without the procfs mounted on /proc.
1374 * The `crypt' function now fails if passed salt bytes that violate the
1375 specification for those values. On Linux, the `crypt' function will
1376 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1377 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1378 when the mode is enabled.
1380 * The `clock_*' suite of functions (declared in <time.h>) is now available
1381 directly in the main C library. Previously it was necessary to link with
1382 -lrt to use these functions. This change has the effect that a
1383 single-threaded program that uses a function such as `clock_gettime' (and
1384 is not linked with -lrt) will no longer implicitly load the pthreads
1385 library at runtime and so will not suffer the overheads associated with
1386 multi-thread support in other code such as the C++ runtime library.
1388 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1393 * The following bugs are resolved with this release:
1395 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1396 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1397 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1398 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1399 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1400 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1401 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1402 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1403 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1404 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1405 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1406 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1407 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1408 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1409 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1410 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1411 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1412 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1413 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1414 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1415 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1416 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1419 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1420 configuring glibc with:
1421 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1422 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1423 Implemented by H.J. Lu.
1427 + define static_assert
1429 + do not declare gets
1431 + declare at_quick_exit and quick_exit also for ISO C11
1433 + aligned_alloc. NB: The code is deliberately allows the size parameter
1434 to not be a multiple of the alignment. This is a moronic requirement
1435 in the standard but it is only a requirement on the caller, not the
1438 + timespec_get added
1440 + uchar.h support added
1442 + CMPLX, CMPLXF, CMPLXL added
1444 Implemented by Ulrich Drepper.
1446 * Support for the IA-64 has been moved to ports.
1448 * Remove support for anything but ELF binary format
1450 * Checking versions of poll, ppoll added.
1451 Implemented by Ulrich Drepper.
1453 * More generic and 64-bit performance optimizations to math functions.
1454 Implemented by Ulrich Drepper.
1456 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1457 headers and functions available at compile time as they were before
1458 version 2.14. This option will be removed at some time in the future
1459 after the TI-RPC library becomes fully sufficient for the needs of
1460 existing applications.
1462 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1463 Note that glibc is not expected to work with any Linux kernel version
1466 * New header <sys/auxv.h> and function getauxval allowing easy access to
1467 the AT_* key-value pairs passed from the Linux kernel. The header also
1468 defines the HWCAP_* bits associated with the AT_HWCAP key.
1470 * New locales: mag_IN
1472 * New configure option --enable-systemtap builds SystemTap static probes
1473 into libc for setjmp and longjmp and into libpthread for various operations.
1474 So far the setjmp/longjmp probes and some of the libpthread probes are
1475 provided only for i*86 and x86_64.
1476 Implemented by Roland McGrath and Rayson Ho.
1478 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1480 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1483 * More optimized functions for SPARC. Implemented by David S. Miller.
1485 * Improved support for cross-compilation, especially bootstrap builds
1486 without a previously built glibc.
1488 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1489 Chris Metcalf from Tilera.
1491 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1492 now supported for ARM processors.
1494 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1495 as the name of the dynamic linker, to distinguish it from the
1496 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1498 * Support for CRIS has been removed from ports.
1500 * A new class of installed header has been documented for low-level
1501 platform-specific functionality. PowerPC added the first instance with a
1502 function to provide time base register access. Contributed by Tulio
1503 Magno Quites Machado Filho.
1505 * ix86 configurations now install header files that are consistent with
1506 what x86-64 configurations install. These same header files can be used
1507 for -m32, -m64, or -mx32 builds.
1508 Contributed by H.J. Lu.
1510 * Math library bug fixes. A thorough audit of all open math library bugs was
1511 conducted by Joseph Myers. Significant progress was made on many math
1512 library bugs resulting in more accurate exceptions and function results.
1513 Many thanks to all those that contributed including Andreas Jaeger for his
1514 patch review and work on the x87 trigonometric instruction issues.
1516 * Timezone data is no longer installed. Timezone-related binaries and scripts
1517 will continue to be installed. Users should obtain their timezone data from
1518 their distribution provider or from the tzdata package at
1519 <ftp://munnari.oz.au/pub/>.
1523 * The following bugs are resolved with this release:
1525 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1526 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1527 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1528 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1529 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1530 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1531 13484, 13506, 13515, 13523, 13524, 13538, 13540
1533 * New program pldd to list loaded object of a process
1534 Implemented by Ulrich Drepper.
1536 * Add nss_db support back to glibc. No more dependency on Berkeley db
1537 and support for initgroups lookups.
1538 Implemented by Ulrich Drepper.
1540 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1541 Contributed by HJ Lu.
1543 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1544 Contributed by HJ Lu.
1546 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1547 on x86-32 and x86-64.
1548 Contributed by Liubov Dmitrieva.
1550 * Optimized strchr and strrchr for SSE on x86-32.
1551 Contributed by Liubov Dmitrieva.
1553 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1554 for x86-64 and x86-32.
1555 Contributed by Liubov Dmitrieva.
1557 * New interfaces: scandirat, scandirat64
1558 Implemented by Ulrich Drepper.
1560 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1561 Implemented by Ulrich Drepper.
1563 * nscd now also caches the netgroup database.
1564 Implemented by Ulrich Drepper.
1566 * Integrate libm with gcc's -ffinite-math-only option.
1567 Implemented by Ulrich Drepper.
1569 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1570 to math functions. Implemented by Ulrich Drepper.
1572 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1573 Implemented by Ulrich Drepper.
1575 * New Linux interfaces: process_vm_readv, process_vm_writev
1577 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1578 Implemented by Ulrich Drepper.
1580 * Optimized nearbyint and strcasecmp for PPC.
1581 Implemented by Adhemerval Zanella.
1583 * New locales: bho_IN, unm_US, es_CU, ta_LK
1587 * The following bugs are resolved with this release:
1589 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1590 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1591 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1592 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1593 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1594 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1595 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1596 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1597 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1598 12795, 12811, 12813, 12814, 12841
1600 * The RPC implementation in libc is obsoleted. Old programs keep working
1601 but new programs cannot be linked with the routines in libc anymore.
1602 Programs in need of RPC functionality must be linked against TI-RPC.
1603 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1605 Visible changes of this change include (obviously) the inability to link
1606 programs using RPC functions without referencing the TI-RPC library and the
1607 removal of the RPC headers from the glibc headers.
1608 Implemented by Ulrich Drepper.
1610 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1611 syncfs, setns, sendmmsg
1613 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1614 yue_HK, lij_IT, mhr_RU
1616 * New encodings: CP770, CP771, CP772, CP773, CP774
1618 * New program sotruss to trace calls through PLTs
1619 Implemented by Ulrich Drepper.
1621 * The malloc hook implementation is marked deprecated and will be removed
1622 from the default implementation in the next version. The design never
1623 worked ever since the introduction of threads. Even programs which do
1624 not create threads themselves can use multiple threads created internally.
1628 * The following bugs are resolved with this release:
1630 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1631 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1632 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1633 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1636 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1638 * POWER7 optimizations: memset, memcmp, strncmp
1640 * New optimized string functions for x86-64: strnlen (SSE2),
1641 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1642 Implemented by Ulrich Drepper.
1646 * The following bugs are resolved with this release:
1648 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1649 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1650 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1651 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1652 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1653 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1654 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1655 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1657 * New interfaces: pthread_getname_np, pthread_setname_np
1659 * New Linux interface: recvmmsg
1661 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1663 * The dynamic linker now recognizes supported ABI versions from the
1664 EI_ABIVERSION field in the ELF header.
1665 Implemented by Ulrich Drepper.
1667 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1668 will not be used to fill in password fields in the passwd.byname replies.
1669 Instead it is used to synthesize the shadow.byname table, should it be
1670 missing. This is a useful mode in some installations involving Solaris.
1671 Implemented by Ulrich Drepper.
1673 * New locales: kok_IN, sq_MK, cv_RU
1677 * The following bugs are resolved with this release:
1679 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1680 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1681 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1682 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1683 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1684 10789, 10817, 10823, 10840, 10847
1686 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1688 Implemented by Ulrich Drepper.
1690 * Checking version of longjmp added that fails if an uninitialized stack
1691 frame would be created. Implemented by Ulrich Drepper.
1693 * STT_GNU_IFUNC is now supported in static executables.
1694 Implemented by H.J. Lu.
1696 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1698 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1699 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1700 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1701 Contributed by H.J. Lu.
1703 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1704 Implemented by Ulrich Drepper.
1706 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1708 Contributed by H.J. Lu.
1710 * Support for fma instruction in AVX on x86-64.
1711 Implemented by H.J. Lu and Ulrich Drepper.
1713 * AVX support in x86-64 auditing support in ld.so.
1714 Implemented by H.J. Lu.
1716 * STB_GNU_UNIQUE support added.
1717 Implemented by Ulrich Drepper.
1719 * Implement second fallback mode for optimized DNS lookup for even more
1720 broken environments. If two requests from the same port are not
1721 handled correctly close the socket and open a new one before sending
1722 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1723 can be used to select this mode right away, instead of rediscovering the
1724 necessity is every process again.
1725 Implemented by Ulrich Drepper.
1727 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1728 Implemented by Adam Tkac.
1730 * Optimized iconv conversions for S390x.
1731 Implemented by Andreas Krebbel.
1733 * Using condvars with PI mutexes is now more efficient due to kernel
1734 support for requeueing to PI futexes. NPTL support added for x86-64.
1735 Implemented by Ulrich Drepper.
1737 * New locales: ps_AF, my_MM
1741 * The following bugs are resolved with this release:
1743 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1744 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1745 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1746 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1747 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1749 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1750 Implemented by Ulrich Drepper.
1752 * New Linux interfaces: accept4, fallocate, fallocate64.
1753 Implemented by Ulrich Drepper.
1755 * Correct declarations of string function when used in C++ code. This
1756 could lead to compile errors for invalid C++ code.
1758 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1761 * New POSIX 2008 interface: psiginfo
1762 Implemented by Ulrich Drepper.
1764 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1765 Implemented by Ulrich Drepper.
1767 * Support for selecting between multiple function definitions at runtime
1768 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1770 * The libcrypt library can now use the hash function implementations in
1771 NSS. Implemented by Ulrich Drepper.
1773 * The malloc implementation can be compiled to be less memory efficient
1774 but higher performing in multi-threaded programs.
1775 Implemented by Ulrich Drepper.
1777 * New locales: nan_TW@latin, ks_IN
1779 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1780 Implemented by Ulrich Drepper.
1782 * Extended printf hook support. It is possible to use user-defined types
1783 and extend existing format specifiers.
1784 Implemented by Ulrich Drepper.
1786 * Handling for group shadow files has been added.
1787 Implemented by Ulrich Drepper.
1789 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1790 servers (the case, e.g., for some people using the built-in DNS
1791 server in ADSL modems/routers). There is a once-per-process timeout
1792 in case of a broken server. To avoid it, users can run nscd or put
1793 'options single-request' in /etc/resolv.conf.
1794 Implemented by Ulrich Drepper.
1798 * The following bugs are resolved with this release:
1800 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1801 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1802 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1803 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1804 6968, 6974, 6980, 6995, 7008, 7009, 7029
1806 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1807 up at the same time. Implemented by Ulrich Drepper.
1809 * TLS descriptors for LD and GD on x86 and x86-64.
1810 Implemented by Alexandre Oliva.
1812 * getaddrinfo now handles DCCP and UDPlite.
1813 Implemented by Ulrich Drepper.
1815 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1816 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1817 Implemented by Ulrich Drepper.
1819 * New implementation of memmem, strstr, and strcasestr which is O(n).
1820 Implemented by Eric Blake.
1822 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1824 * Implement "e" option for popen to open file descriptor with the
1825 close-on-exec flag set. Implemented by Ulrich Drepper.
1827 * Implement "b" mode for fmemopen. In this mode writes writes don't
1828 implicitly add a NUL byte and seeks from the end of the buffer really
1829 use the buffer end, not the string length as the basis.
1830 Implemented by Ulrich Drepper.
1832 * Many functions, exported and internal, now atomically set the close-on-exec
1833 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1835 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1837 Implemented by Pravin Satpute.
1839 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1843 * The following bugs are resolved with this release:
1845 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1846 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1847 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1848 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1849 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1850 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1851 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1853 * New locales: bo_CN, bo_IN, shs_CA.
1855 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1857 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1858 Implemented by Pravin Satpute.
1860 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1862 * nscd caches now all timeouts for DNS entries
1863 Implemented by Ulrich Drepper.
1865 * nscd is more efficient and wakes up less often.
1866 Implemented by Ulrich Drepper.
1868 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1869 vdprintf, and obstack_vprintf.
1870 Implemented by Jakub Jelinek.
1872 * Faster memset for x86-64.
1873 Implemented by Harsha Jagasia and H.J. Lu.
1875 * Faster memcpy on x86.
1876 Implemented by Ulrich Drepper.
1878 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1879 Implemented by Ulrich Drepper.
1881 * Faster sqrt and sqrtf implemention for some PPC variants.
1882 Implemented by Steven Munroe.
1886 * The following bugs are resolved with this release:
1888 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1889 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1890 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1891 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1892 5071, 5103, 5104, 5112, 5113, 5184, 5186
1894 * More checking functions: fread, fread_unlocked, open*, mq_open.
1895 Implemented by Jakub Jelinek and Ulrich Drepper.
1897 * Extend fortification to C++. Implemented by Jakub Jelinek.
1899 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1900 by not recognizing 'a' as a modifier when those specs are requested.
1901 Implemented by Jakub Jelinek.
1903 * PPC optimizations to math and string functions.
1904 Implemented by Steven Munroe.
1906 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1907 options to be passed. Implemented by Ulrich Drepper.
1909 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1911 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1912 Implemented by Ulrich Drepper.
1914 * Handle private futexes in the NPTL implementation.
1915 Implemented by Jakub Jelinek and Ulrich Drepper.
1917 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1918 Implemented by Roland McGrath and Ulrich Drepper.
1920 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1922 * SHA-256 and SHA-512 based password encryption.
1923 Implemented by Ulrich Drepper.
1925 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1926 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1929 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1930 Implemented by Ulrich Drepper.
1934 * The following bugs are resolved with this release:
1936 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1937 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1938 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1939 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1940 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1941 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1942 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1945 * New Linux interfaces: epoll_pwait, sched_getcpu.
1947 * New generic interfaces: strerror_l.
1949 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1953 * The following bugs are resolved with this release:
1955 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1956 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1957 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1958 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1959 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1960 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1961 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1962 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1963 3225, 3251, 3252, 3253, 3273
1965 * For Linux, the sorting of addresses returned by getaddrinfo now also
1966 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1967 Implemented by Ulrich Drepper.
1969 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1970 Implemented by Ulrich Drepper.
1972 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1974 * New iconv module for MIK. Contributed by Alexander Shopov.
1976 * For sites with broken group and/or passwd database, the auto-propagate
1977 option of nscd can prevent creating ID lookup entries from the results
1978 of a name lookup and vice versa. This usually is no problem but some
1979 site might have problems with the default behavior.
1980 Implemented by Ulrich Drepper.
1982 * Iterating over entire database in NIS can be slow. With the
1983 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1984 to trade time for memory. The entire database will be read at once.
1985 Implemented by Ulrich Drepper.
1987 * The interfaces introduced in RFC 3542 have been implemented by
1990 * Support for the new ELF hash table format was added by Ulrich Drepper.
1992 * Support for priority inheritance mutexes added by Jakub Jelinek and
1995 * Support for priority protected mutexes added by Jakub Jelinek.
1997 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1998 or_IN, csb_PL, fy_NL, sr_ME.
2002 * More overflow detection functions.
2004 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2005 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2007 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2008 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2009 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2010 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2011 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2012 by Masahide Washizawa.
2014 * It is now possible to install audit libraries for the dynamic linker using
2015 LD_AUDIT. Implemented by Ulrich Drepper.
2017 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2018 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2019 For a libc and libpthread that works well on Linux 2.4 kernels, we
2020 recommend using the stable 2.3 branch.
2022 * The new function open_wmemstream acts like open_memstream,
2023 but uses a wchar_t wide character buffer.
2025 * The new function ppoll is an improved version of poll, similar to pselect.
2027 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2028 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2029 renameat, unlinkat, linkat, symlinkat, readlinkat.
2031 * New Linux kernel system calls: unshare,
2032 inotify_init, inotify_add_watch, inotify_rm_watch.
2034 * The euidaccess function is now also known by the alias eaccess,
2035 for compatibility with some other systems.
2037 * Timezone data updated to 2006b version.
2041 * The following bugs are resolved with this release:
2043 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2044 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2045 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2046 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2047 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2048 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2050 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2052 * As of this release, GCC 4 can be used to compile the C Library.
2054 * Timezone data updated to 2005m version.
2058 * The following bugs are resolved with this release:
2060 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2061 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2062 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2063 777, 787, 821, 822, 823, 825
2065 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2069 * Support for RFC 3678. Real implementations exist only for Linux so far.
2070 Implemented by Ulrich Drepper.
2072 * nscd can now cache entries persistently. Expiring entries are reloaded.
2073 For speedups the cache can be shared in memory with client processes.
2074 Implemented by Ulrich Drepper.
2076 * nscd can now perform SELinux checks.
2077 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2079 * getaddrinfo queries are now cached. Canonical name lookup is performed
2081 Implemented by Ulrich Drepper.
2083 * The nothrow function attribute is used when headers are used by gcc when
2084 compiling C code. This can avoid significant amounts of exception
2087 * The malloc functions perform more error checking and are stricter when
2088 it comes to reacting on errors. The default action is to terminate
2089 the process after showing an error message. Implemented by Ulrich Drepper.
2091 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2092 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2094 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2095 namespaces using the new function dlmopen(). This feature is of course,
2096 like most other dynamic loading functionality, not available in statically
2097 linked applications. Implemented by Ulrich Drepper.
2099 * Low-overhead boundary checking variants of string and some stdio functions
2100 were added. These are to be used in conjunction with a gcc patch by
2101 Jakub Jelinek which adds calls to these functions if possible.
2102 Implemented by Jakub Jelinek and Ulrich Drepper.
2104 * Old code for several operating systems and machine architectures that
2105 have not been in working condition in a long time have been removed from
2106 the main source tree maintained by the GNU C Library's maintainers.
2107 These files are now reside in the separate `ports' source module
2108 that is usable as an add-on when building the library.
2112 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2113 interrogate the dynamic linker, compatible with the Solaris interface.
2115 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2116 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2118 * getifaddrs now uses the netlink interface on Linux to get its information.
2119 Implemented by Thorsten Kukuk.
2121 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2122 Implemented by Ulrich Drepper.
2124 * support for non-executable stacks on x86 has been added. Changes mostly
2127 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2130 * getaddrinfo now performs destination address selection according to
2135 * Thread-safe interfaces for many functions that access locale data
2136 were added in version 2.3, but these features were omitted from NEWS.
2137 Many functions have variants with an `_l' suffix that take a `locale_t'
2138 object as a parameter rather than consulting the current locale.
2139 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2140 create and maintain `locale_t' objects. Additionally, the new function
2141 `uselocale' sets "the current locale" (as used by functions not so
2142 parameterized) set for an individual thread. These features were added
2143 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2145 * The functions getresuid, getresgid, setresuid, and setresgid, which
2146 have long been available on Linux, are now declared in <unistd.h>
2147 and are now also available on the Hurd.
2149 * ELF thread-local storage support (TLS) now works on x86-64.
2151 * The new dynamic string token $LIB is expanded in shared library names.
2152 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2154 * Aldy Hernandez contributed complete software floating point support for
2155 PowerPC machines with no FPU.
2157 * fexecve is implemented on Linux.
2159 * The `btowc' function should work at least twice as fast due to
2160 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2162 * With approriate thread add-ons cancelable functions are now implemented
2163 in libc.so as well. No need to call the function in libpthread. This
2164 change allowed to finally disable the incorrect and expensive handling
2165 of weak definition in ld.so.
2167 * Yet more PLT entries in libc.so have been removed. We finally arrived
2168 at the bare minimum. Startup times improved appropriately.
2170 * Support for the new Linux/x86 system call interface was added. The
2171 AT_SYSINFO auxiliary vector entry is recognized and handled.
2175 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2178 * iconv (the program and the interface) now accepts empty names (excluding
2179 options like //TRANSLIT) to mean "use charset of current locale".
2181 * localedef can now transliterate characters in strings which are not in
2182 the provided charmap. The information from the input locale is used.
2184 * Prelinking support was added for ELF targets. This requires additional
2185 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2187 * Read-only stdio streams now use mmap to speed up operation by eliminating
2188 copying and buffer underflows. To use add 'm' to the mode string of
2189 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2191 * The malloc functions were completely rewritten by Wolfram Gloger based
2192 on Doug Lea's malloc-2.7.0.c.
2194 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2195 implementation of regex.
2197 * Bruno Haible upgraded the iconv and locale implementation to support
2200 * Contents of the LC_* and LANG environment variables in the CEN style are
2201 not recognized anymore. It never was used. Change by Ulrich Drepper.
2203 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2204 thread-local storage (TLS) ABI on some platforms.
2205 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2207 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2208 EUC-JISX0213, and TSCII.
2210 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2211 BSD-compatible interface for getting all network interface addresses.
2212 Implementation for IPv4 by Roland McGrath.
2214 * Loading of locale data is faster due to the introduction of a locale
2215 archive. Implemented by Roland McGrath and Ulrich Drepper.
2217 * Startup times are significantly reduced by not using exported functions
2218 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2221 * Steven Munroe contributed a port to PowerPC64/Linux.
2225 * The Hurd now uses the GNU libio implementation of stdio rather than the
2226 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2228 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2229 with the same behavior as the Linux system call of the same name.
2233 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2234 128-bit long double format.
2236 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2237 IBM1161, and IBM1162 charsets.
2239 * Andreas Jaeger contributed a port to x86-64/Linux.
2241 * Peter Bruin contributed a port to PowerPC/Hurd.
2243 * libc functions using I/O streams now can handle wide-oriented streams
2246 * optimizations in the dynamic linker. Binaries created by recent binutils
2247 versions start up quicker due to reduced time spent on relocations.
2249 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2253 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2254 asinh, atanh, j0 for the 128-bit long double format.
2256 * Bruno Haible updated all the code handling Unicode in some form to
2257 support Unicode 3.1.
2259 * Speed of regex for single-byte locales is back to previous levels.
2260 Patch by Isamu Hasegawa.
2262 * Alpha, SPARC, and IA-64 now also using floating stacks.
2264 * Startup time of internationalized applications greatly improved through
2265 iconv cache. Use iconvconfig to generate the cache file.
2266 Contributed by Ulrich Drepper.
2268 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2269 severe performance problems. Patch by David Mosberger.
2271 * The Hurd port got a lot more functionality like AIO, various stdio
2272 extensions, etc. Mainly done by Roland McGrath.
2274 * mtrace can now lookup symbols in shared libraries.
2278 * Intel's IA-64 math library is largely integrated. It provides fast and
2279 accurate implementatations for most basic and standard math functions
2280 in float, double, and long double format.
2282 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2283 and asin for the 96-bit long double format and asin, log, tan for the
2284 128-bit long double format.
2286 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2287 The basic double functions exist today. Contributed by Abraham Ziv
2288 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2289 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2291 * An asynchronous name lookup library was added. The interface is designed
2292 after POSIX AIO. The proposal was circulated beforehand to get comments.
2293 No negative ones came in. Implemented by Ulrich Drepper.
2295 * Port to S390/64bit contributed by Martin Schwidefsky
2296 <schwidefsky@de.ibm.com>.
2298 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2299 of functions for Linux/IA-64.
2301 * The RPC code is now thread safe. Threads can now use the same service
2302 of different services at the same time. Patch by Eric Norum
2303 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2305 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2306 family of functions for Linux/S390.
2308 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2309 of functions for Linux/x86.
2311 * Port to Linux/CRIS contributed by Axis Communications.
2315 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2316 we can now check for namespace violations and missing declarations. The
2317 result is that almost all headers are now Unix-compliant (as defined in
2318 the upcoming XPG6). The negative side is that some programs might need
2319 corrections, too, if they depend on the incorrect form of the headers in
2320 previous versions which defined too many symbols and included too many
2323 * regex now handles multibyte character sets correctly.
2324 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2326 * iconv (the program) does now conform to the upcoming XPG6 and handles
2327 charmaps. Instead of the charset names the path of charmaps can be
2328 provided and the conversion happens based on this data.
2329 Contributed by Ulrich Drepper.
2331 * The locale program now provides detailed information about the installed
2336 only lists the names of the supported locales
2340 provides details such as country, language, and codeset name.
2341 Contributed by Ulrich Drepper.
2345 * The gencat program now parses the input file according to the charset
2346 selected by the LC_CTYPE category. This is important for stateful
2347 character sets. To make generating catalogs easier there is a way
2348 to overwrite the charset selected by the locale: before the first
2349 message or $ quote line the catalog can contain a line like
2351 $ codeset=ISO-8859-2
2353 to select the charset (ISO-8859-2 in this case).
2355 Implemented by Shinya Hanataka and Ulrich Drepper.
2357 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2358 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2359 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2361 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2362 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2364 * The LANGUAGE environment variable is now ignored unless the locale is
2365 changed from the default "C" locale.
2367 * The usual bug fixes.
2371 * Greg McGary added runtime support for bounds checking using gcc's
2372 new -fbounded-pointers option. ix86 target is complete. PowerPC
2375 * Thorsten Kukuk added secure mode support to nscd.
2377 * The Berkeley db libraries have been removed.
2379 Related, the nss_db module is now in a separate package since it
2380 obviously requires a database library being available.
2382 * Wide character I/O streams implemented by Ulrich Drepper.
2384 * Functions from the extended socket API added by Ulrich Drepper.
2386 * Functions feenableexcept and fedisableexcept to control the
2387 behaviour of individual exceptions have been added by Andreas Jaeger.
2389 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2391 * The resolver code has been updated from bind 8.2.3-T5B which supports
2392 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2395 This change could in some situations effect backward compatibility. Since
2396 now `_res' is a thread-local instead of a global variable, modifying it
2397 in one thread does not have any effect in other threads.
2399 The resolver library was also extended to allow IPv6 as the transport
2400 protocol for the requests. This work was done by Stig Venaas.
2402 * Compatibility code for K&R C compilers has been removed from the
2403 header files. A ISO C compiler is needed to use the library
2404 (conforming to either C89 or C99 standard).
2406 * Complete rewrite of the localedef program to support multibyte character
2407 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2408 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2409 Implemented by Ulrich Drepper.
2411 Bruno Haible significantly improved the generation and use of the data
2412 structures for the wide character tables.
2414 * Plural handling in gettext implemented by Ulrich Drepper.
2416 * The utmp daemon has been removed.
2418 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2420 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2423 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2425 * POSIX barriers implemented by Kaz Kylheku.
2427 * POSIX spawn function family implemented by Ulrich Drepper.
2429 * POSIX spinlocks are now available.
2431 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2433 * the configure option --enable-kernel=X.Y.Z allows to strip out
2434 compatibility for kernel versions before X.Y.Z. This is currently only
2435 implemented for Linux.
2437 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2438 field sin6_scope_id. This means that all programs using IPv6 should be
2439 recompiled. Don't expect binary compatibility with previous glibc
2442 * various conversion modules for IBM character sets contributed by
2445 * IA-64 port by Jes Sorensen and HJ Lu.
2459 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2461 * New xdr functions are added; some rpc functions are now 64bit clean.
2463 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2465 * Fixed known incompatibilities with glibc 2.0.
2467 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2469 * Optimized a number of functions (especially the ELF dynamic loader).
2471 * Update timezone data files.
2473 * lots of charmaps corrections
2475 * some new locale definitions and charmaps
2480 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2481 conform to POSIX member type requirements. Symbol versions have been
2482 adjusted as needed within the library, and for direct use by applications,
2483 but there is potential for problems if third-party libraries use
2484 struct timeval as part of their interface. This does not present
2485 a problem for X and other "essential" system libraries.
2487 * An additional locale model to support C++ Standard Library locale
2488 model and probably more was implemented by Ulrich Drepper.
2490 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2493 * Miles Bader provided the `argp' function family to support hierachical
2494 command line argument parsing, layered on top of getopt.
2496 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2498 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2501 * scanf recognizes the %a and %A format for scanning floating point numbers.
2503 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2504 information and interfaces for the available integer types.
2506 * about 130 new math functions were added to implement the ISO C9x math
2509 * the new header <complex.h> contains definitions of the complex math
2510 functions from ISO C 9X.
2512 * the new header <tgmath.h> defines generic macros to use complex or
2513 real valued functions.
2515 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2517 * Andreas Jaeger provided a test suite for the math library.
2519 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2521 * Ulrich Drepper added character set conversion functions (iconv).
2523 * Optimized string functions have been added.
2525 * The localedata addon is now part of glibc.
2527 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2529 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2530 daemon for NSS (nscd).
2532 Missing a better place here are some numbers on improvements. Under
2533 Linux 2.1.125 un-tar-ing the kernel sources takes
2537 using local files 12.19s 6.88s 22.91s
2539 using NIS 13.92s 8.91s 26.34s
2541 using NIS & nscd 10.37s 7.34s 25.30s
2543 using NIS+ 27.57s 30.37s 640.46s
2545 using NIS+ & nscd 10.25s 7.83s 26.51s
2547 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2549 Keep in mind that non-namelookup related operations dominate above times.
2550 It was just a common complain that using NIS+ unpacking the kernel is
2553 [1] The old nscd implementation is not available anymore since it was
2554 distributed with glibc up to version 2.0.98 and thus is now replaced.
2556 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2558 * Mark Kettenis provided a Hesiod NSS module.
2560 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2561 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2563 * rcmd can now handle netgroups (Dick Streefland).
2565 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2568 * Support for the IPv6 protocol has been added to the socket API, as per the
2569 latest draft standards.
2571 * Support for Linux 2.2 has been added.
2573 * Interface changes relative to the latest 2.0.x release:
2574 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2575 addseverity NEW: Unix98
2576 alphasort64 NEW: LFS
2577 argp_err_exit_status NEW: argp, GNU ext
2578 argp_error NEW: argp, GNU ext
2579 argp_failure NEW: argp, GNU ext
2580 argp_help NEW: argp, GNU ext
2581 argp_parse NEW: argp, GNU ext
2582 argp_program_bug_address NEW: argp, GNU ext
2583 argp_program_version NEW: argp, GNU ext
2584 argp_program_version_hook NEW: argp, GNU ext
2585 argp_state_help NEW: argp, GNU ext
2586 argp_usage NEW: argp, GNU ext
2587 authdes_create NEW: Secure RPC
2588 authdes_getucred NEW: Secure RPC
2589 authdes_pk_create NEW: Secure RPC
2590 backtrace NEW: GNU ext.
2591 backtrace_symbols NEW: GNU ext.
2592 backtrace_symbols_fd NEW: GNU ext.
2594 cacosf NEW: ISO C 9x
2595 cacosh NEW: ISO C 9x
2596 cacoshf NEW: ISO C 9x
2597 cacoshl NEW: ISO C 9x
2598 cacosl NEW: ISO C 9x
2605 casinf NEW: ISO C 9x
2606 casinh NEW: ISO C 9x
2607 casinhf NEW: ISO C 9x
2608 casinhl NEW: ISO C 9x
2609 casinl NEW: ISO C 9x
2611 catanf NEW: ISO C 9x
2612 catanh NEW: ISO C 9x
2613 catanhf NEW: ISO C 9x
2614 catanhl NEW: ISO C 9x
2615 catanl NEW: ISO C 9x
2616 cbc_crypt NEW: Secure RPC
2620 ccoshf NEW: ISO C 9x
2621 ccoshl NEW: ISO C 9x
2627 cimagf NEW: ISO C 9x
2628 cimagl NEW: ISO C 9x
2629 clearerr_locked REMOVED
2630 clntunix_create NEW: sunrpc ext
2632 clog10 NEW: ISO C 9x
2633 clog10f NEW: ISO C 9x
2634 clog10l NEW: ISO C 9x
2644 cprojf NEW: ISO C 9x
2645 cprojl NEW: ISO C 9x
2647 crealf NEW: ISO C 9x
2648 creall NEW: ISO C 9x
2653 csinhf NEW: ISO C 9x
2654 csinhl NEW: ISO C 9x
2657 csqrtf NEW: ISO C 9x
2658 csqrtl NEW: ISO C 9x
2662 ctanhf NEW: ISO C 9x
2663 ctanhl NEW: ISO C 9x
2665 des_setparity NEW: Secure RPC
2666 ecb_crypt NEW: Secure RPC
2667 endutxent NEW: Unix98
2669 exp10f NEW: ISO C 9x
2670 exp10l NEW: ISO C 9x
2674 fattach NEW: STREAMS
2675 fdetach NEW: STREAMS
2679 feclearexcept NEW: ISO C 9x
2680 fegetenv NEW: ISO C 9x
2681 fegetexceptflag NEW: ISO C 9x
2682 fegetround NEW: ISO C 9x
2683 feholdexcept NEW: ISO C 9x
2685 feraiseexcept NEW: ISO C 9x
2686 ferror_locked REMOVED
2687 fesetenv NEW: ISO C 9x
2688 fesetexceptflag NEW: ISO C 9x
2689 fesetround NEW: ISO C 9x
2690 fetestexcept NEW: ISO C 9x
2691 feupdateenv NEW: ISO C 9x
2692 fflush_locked REMOVED
2696 fgets_unlocked NEW: GNU ext.
2697 fileno_locked REMOVED
2709 fputc_locked REMOVED
2710 fputs_unlocked NEW: GNU ext.
2711 fread_unlocked NEW: GNU ext.
2716 fstatvfs NEW: Unix98
2720 ftruncate64 NEW: LFS
2722 fwrite_unlocked NEW: GNU ext.
2723 gai_strerror NEW: IPv6
2727 getchar_locked REMOVED
2729 getdate_err NEW: Unix98
2730 getdate_r NEW: GNU ext.
2732 getnameinfo NEW: IPv6
2733 getnetname NEW: Secure RPC
2734 getpmsg NEW: STREAMS
2735 getpt NEW: Unix98 PTY
2736 getrlimit64 NEW: LFS
2737 getutxent NEW: Unix98
2738 getutxid NEW: Unix98
2739 getutxline NEW: Unix98
2740 glob64 NEW: GNU ext.
2741 globfree64 NEW: GNU ext.
2742 gnu_get_libc_release NEW: GNU ext.
2743 gnu_get_libc_version NEW: GNU ext.
2744 grantpt NEW: Unix98 PTY
2745 host2netname NEW: Secure RPC
2747 iconv_close NEW: iconv
2748 iconv_open NEW: iconv
2749 if_freenameindex NEW: IPv6
2750 if_indextoname NEW: IPv6
2751 if_nameindex NEW: IPv6
2752 if_nametoindex NEW: IPv6
2753 in6addr_any NEW: IPv6
2754 in6addr_loopback NEW: IPv6
2755 inet6_isipv4mapped NEW: IPv6
2756 isastream NEW: STREAMS
2757 iswblank NEW: GNU ext.
2758 key_decryptsession NEW: Secure RPC
2759 key_decryptsession_pk NEW: Secure RPC
2760 key_encryptsession NEW: Secure RPC
2761 key_encryptsession_pk NEW: Secure RPC
2762 key_gendes NEW: Secure RPC
2763 key_get_conv NEW: Secure RPC
2764 key_secretkey_is_set NEW: Secure RPC
2765 key_setnet NEW: Secure RPC
2766 key_setsecret NEW: Secure RPC
2767 llrint NEW: ISO C 9x
2768 llrintf NEW: ISO C 9x
2769 llrintl NEW: ISO C 9x
2770 llround NEW: ISO C 9x
2771 llroundf NEW: ISO C 9x
2772 llroundl NEW: ISO C 9x
2777 lrintf NEW: ISO C 9x
2778 lrintl NEW: ISO C 9x
2779 lround NEW: ISO C 9x
2780 lroundf NEW: ISO C 9x
2781 lroundl NEW: ISO C 9x
2783 makecontext NEW: Unix98
2784 mempcpy NEW: GNU ext.
2787 modify_ldt NEW: kernel
2791 nearbyint NEW: ISO C 9x
2792 nearbyintf NEW: ISO C 9x
2793 nearbyintl NEW: ISO C 9x
2794 netname2host NEW: Secure RPC
2795 netname2user NEW: Secure RPC
2796 nexttoward NEW: ISO C 9x
2797 nexttowardf NEW: ISO C 9x
2798 nexttowardl NEW: ISO C 9x
2802 passwd2des NEW: Secure RPC
2804 pow10f NEW: GNU ext.
2805 pow10l NEW: GNU ext.
2808 printf_size NEW: GNU ext.
2809 printf_size_info NEW: GNU ext.
2810 profil_counter REMOVED
2811 pthread_mutexattr_getkind_np REPLACED
2812 pthread_mutexattr_setkind_np REPLACED
2813 ptsname NEW: Unix98 PTY
2814 ptsname_r NEW: Unix98 PTY
2816 putchar_locked REMOVED
2817 putgrent NEW: GNU ext.
2819 putpmsg NEW: STREAMS
2820 pututxline NEW: Unix98
2824 readdir64_r NEW: LFS
2825 remquo NEW: ISO C 9x
2826 remquof NEW: ISO C 9x
2827 remquol NEW: ISO C 9x
2829 roundf NEW: ISO C 9x
2830 roundl NEW: ISO C 9x
2832 scalbln NEW: ISO C 9x
2833 scalblnf NEW: ISO C 9x
2834 scalblnl NEW: ISO C 9x
2836 sendfile NEW: kernel
2837 setcontext NEW: Unix98
2838 setrlimit64 NEW: LFS
2839 setutxent NEW: Unix98
2841 sigignore NEW: Unix98
2842 sigqueue NEW: POSIX.1b
2843 sigrelse NEW: Unix98
2844 sigset NEW: POSIX.1b
2845 sigtimedwait NEW: POSIX.1b
2846 sigwaitinfo NEW: POSIX.1b
2847 sincos NEW: GNU ext.
2848 sincosf NEW: GNU ext.
2849 sincosl NEW: GNU ext.
2853 strcasestr NEW: GNU ext.
2854 strtoimax NEW: ISO C 9x
2855 strtoumax NEW: ISO C 9x
2856 strverscmp NEW: GNU ext.
2857 svcauthdes_stats NEW: Secure RPC
2858 svcunix_create NEW: sunrpc etx
2859 svcunixfd_create NEW: sunrpc ext
2860 swapcontext NEW: Unix98
2861 tcgetsid NEW: Unix98 PTY
2862 tdestroy NEW: GNU ext.
2863 tgamma NEW: ISO C 9x
2864 tgammaf NEW: ISO C 9x
2865 tgammal NEW: ISO C 9x
2869 truncf NEW: ISO C 9x
2870 truncl NEW: ISO C 9x
2872 unlockpt NEW: Unix98 PTY
2873 updwtmpx NEW: Unix98
2874 user2netname NEW: Secure RPC
2875 utmpxname NEW: Unix98
2876 versionsort NEW: GNU ext.
2877 versionsort64 NEW: GNU ext.
2879 wcscasecmp NEW: GNU ext.
2880 wcsncasecmp NEW: GNU ext.
2881 wcsnlen NEW: GNU ext.
2882 wcstoimax NEW: ISO C 9x
2883 wcstoll NEW: ISO C 9x
2884 wcstoull NEW: ISO C 9x
2885 wcstoumax NEW: ISO C 9x
2887 wordexp NEW: POSIX.2
2888 wordfree NEW: POSIX.2
2889 write_profiling REMOVED
2890 xdecrypt NEW: Secure RPC
2891 xdr_authdes_cred NEW: Secure RPC
2892 xdr_authdes_verf NEW: Secure RPC
2893 xdr_cryptkeyarg NEW: Secure RPC
2894 xdr_cryptkeyarg2 NEW: Secure RPC
2895 xdr_cryptkeyres NEW: Secure RPC
2896 xdr_getcredres NEW: Secure RPC
2897 xdr_key_netstarg NEW: Secure RPC
2898 xdr_key_netstres NEW: Secure RPC
2899 xdr_keybuf NEW: Secure RPC
2900 xdr_keystatus NEW: Secure RPC
2901 xdr_netnamestr NEW: Secure RPC
2902 xdr_sizeof NEW: Secure RPC
2903 xdr_unixcred NEW: sunrpc ext
2904 xencrypt NEW: Secure RPC
2905 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2916 * inet_ntoa is thread-safe
2918 * updwtmp is moved from libutil to libc
2920 * rewrite of cbrt function
2922 * update of timezone data
2936 * add atoll function
2938 * fix complex problems in Berkeley DB code
2940 * fix math functions
2944 * fixed lots of header problems (especially Linux/GNU specific)
2946 * dynamic loader preserves all registers
2948 * Roland McGrath provided support for handling of auxiliary objects in
2949 the ELF dynamic loader.
2951 * support for parallel builds is improved
2955 * GNU extensions are no longer declared by default. To enable them you
2956 must define the macro `_GNU_SOURCE' in your program or compile with
2959 * The library has changed from using GNU ld symbol aliases to using weak
2960 symbols where available. The ELF object file format supports weak
2961 symbols; GNU ld also supports weak symbols in the a.out format. (There
2962 is also now support for other GNU ld extensions in ELF. Use the
2963 `--with-elf' option to configure to indicate you have ELF, and
2964 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2965 of many files which contained only symbol aliases, reducing the size of
2966 the source and the compiled library; many other files were renamed to
2967 less cryptic names previously occupied by the symbol alias files.
2968 There is a new header file <elf.h> for programs which operate on
2969 files in the ELF format.
2971 * Converted to Autoconf version 2, so `configure' has more options.
2972 Run `configure --help' to see the details.
2974 * The library can now be configured to build profiling, highly-optimized
2975 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2976 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2977 `configure' enable building these extra libraries. The shared library is
2978 built by default when using both ELF and GNU ld. When shared libraries
2979 are enabled, the new library `-ldl' is available for arbitrary run-time
2980 loading of shared objects; its interface is defined in <dlfcn.h>. The
2981 new header file <link.h> gives access to the internals of the run-time
2982 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2983 application of same name on other systems and it provides information
2984 about dynamically linked binaries.
2986 * The C library now provides the run-time support code for profiling
2987 executables compiled with `-pg'. Programs can control the profiling code
2988 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2989 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2990 the support for this file format was contributed by David Mosberger-Tang.
2992 * The math code has been replaced with a math library based on fdlibm from
2993 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2994 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2995 functions. The math functions now reside in a separate library, so
2996 programs using them will need to use `-lm' their linking commands.
2998 * John C. Bowman contributed optimized ix87 assembler inline functions.
3000 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3001 mechanism similar to that found in Solaris 2. This is now used for the
3002 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3003 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3004 file controls what services are used for each individual database. This
3005 works by loading shared libraries with names specified in `nsswitch.conf',
3006 so service modules can be changed or added at any time without even
3007 relinking any program. Currently there are the file, db, and NIS based
3008 NSS services available.
3010 * The new functions `strtoq' and `strtouq' parse integer values from
3011 strings, like `strtol' and `strtoul', but they return `long long int' and
3012 `unsigned long long int' values, respectively (64-bit quantities).
3014 * The new functions `strtof' and `strtold' parse floating-point values from
3015 strings, like `strtod', but they return `float' and `long double' values,
3016 respectively (on some machines `double' and `long double' are the same).
3018 * Ulrich Drepper has contributed new implementations of the floating-point
3019 printing and reading code used in the `printf' family of functions and
3020 `strtod', `strtof', and `strtold'. These new functions are perfectly
3021 accurate, and much faster than the old ones.
3023 * The implementation of the POSIX locale model was completely rewritten by
3024 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3025 to compile the POSIX locale definition.
3027 * The former dummy implementations of the strcoll and strxfrm function are
3028 now replaced by fully functional code contributed by Ulrich Drepper. The
3029 collation information comes from the POSIX locale definitions.
3031 * The new header <langinfo.h> defines an interface for accessing
3032 various locale-dependent data (using the locale chosen with `setlocale').
3034 * Ulrich Drepper has contributed a new suite of functions for operation on
3035 wide-character and multibyte-character strings, in <wchar.h>;
3036 and classification and case conversion of wide characters, in <wctype.h>.
3037 These new functions are conforming to the ISO C, Amendement 1 specification.
3039 * There is now a second implementation of the standard I/O library available.
3040 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3041 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3043 * You can now use positional parameter specifications in format strings
3044 for the `printf' and `scanf' families of functions. For example,
3045 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3046 ``Number 6, Mr Jones''. This is mainly useful when providing different
3047 format strings for different languages, whose grammars may dictate
3048 different orderings of the values being printed. To support this
3049 feature, the interface for `register_printf_handler' has changed; see
3050 the header file <printf.h> for details.
3052 * The `printf' and `scanf' families of functions now understand a new
3053 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3054 to group numbers as indicated by the locale; for `scanf' and friends, this
3055 says to accept as valid only a number with all the proper grouping
3056 separators in the right places. In the default "C" locale, numbers are
3057 not grouped; but locales for specific countries will define the usual
3058 conventions (i.e. separate thousands with `,' in the US locale).
3060 * The pgrp functions have been regularized, slightly incompatibly but much
3061 less confusingly. The core functions are now `getpgid' and `setpgid',
3062 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3063 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3064 provided for compatibility. There is no longer an incompatible `getpgrp'
3065 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3067 * The new header file <fts.h> and suite of functions simplify programs that
3068 operate on directory trees. This code comes from 4.4 BSD.
3070 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3071 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3072 NSS scheme used in glibc.
3074 * There is a new malloc debugging hook `__memalign_hook'.
3076 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3077 `unsigned int' in <sys/types.h>. These are for compatibility only and
3078 their use is discouraged.
3080 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3081 done differently, so that it works even without GNU ld.
3083 * New function `euidaccess' checks allowed access to a file like `access',
3084 but using the effective IDs instead of the real IDs.
3086 * The time zone data files have been updated for the latest and greatest
3087 local time conventions of the countries of the world.
3089 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3092 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3093 for formatting floating-point numbers. They are provided only for
3094 compatibility; new programs should use `sprintf' instead. There are
3095 also equivalent function for the `long double' floating-point type and
3096 all functions also exist in a reentrant form.
3098 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3099 functions for maintaining the login-record files (primarily of use to
3100 system programs such as `login'), and convenient functions for
3101 allocating and initializing a pseudo-terminal (pty) device.
3103 * Ulrich Drepper has contributed new support for System V style
3104 shared memory and IPC on systems that support it.
3106 * Ulrich Drepper has contributed several miscellaneous new functions found
3107 in System V: The `hsearch' family of functions provide an effective
3108 implementation of hash tables; `a64l' and `l64a' provide a very simple
3109 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3112 * Ulrich Drepper has contributed new reentrant counterparts for the
3113 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3115 * Ulrich Drepper has contributed new, highly-optimized versions of several
3116 string functions for the i486/Pentium family of processors.
3118 * Ulrich Drepper has updated the Linux-specific code, based largely
3119 on work done in Hongjiu Lu's version of GNU libc for Linux.
3120 The GNU library now supports Linux versions 2.0.10 and later,
3121 using the ELF object file format (i[3456]86-*-linux).
3123 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3125 * David Mosberger-Tang and Richard Henderson have ported the C library
3126 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3127 dynamic linking support for ELF/Alpha.
3129 * Richard Henderson contributed several Alpha optimized assembler function
3130 for arithmetic and string handling.
3132 * Ulrich Drepper has contributed a new set of message catalog functions to
3133 support multiple languages using the <libintl.h> interface, for use with
3134 his new package GNU gettext. Translation volunteers have contributed
3135 catalogs of the library's messages in Spanish, German, and Korean.
3137 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3138 program and the `catgets' function for reading the catalog files it
3139 creates. (The <libintl.h> interface is preferred; we include the
3140 <nl_types.h> interface using `catgets' only for source compatibility with
3141 programs already written to use it.)
3143 * New header file <values.h> gives SVID-compatible names for <limits.h>
3146 * Various new macros, declarations, and small header files for compatibility
3149 * New function `group_member' is a convenient way to check if a process has
3150 a given effective group ID.
3152 * When using GCC 2.7 and later, the socket functions are now declared in a
3153 special way so that passing an argument of type `struct sockaddr_in *',
3154 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3155 `struct sockaddr *' type, does not generate a type-clash warning.
3157 * New function `error' declared in header file <error.h> is a convenient
3158 function for printing error messages and optionally exiting; this is the
3159 canonical function used in GNU programs. The new functions `err', `warn',
3160 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3161 doing the same thing.
3163 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3164 POSIX.2 `glob' function to do ~ and {...} expansion.
3166 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3167 `clearenv' which is used in POSIX.9 is also available.
3169 * New function `getsid' returns session ID number on systems that support it.
3171 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3172 files <db.h> and <mpool.h> provide a rich set of functions for several
3173 types of simple databases stored in memory and in files, and <ndbm.h> is
3174 an old `ndbm'-compatible interface using the `db' functions. Link with
3175 `-ldb' to get these functions.
3177 * New macro `strdupa' copies a string like `strdup', but uses local stack
3178 space from `alloca' instead of dynamic heap space from `malloc'.
3180 * New function `strnlen' is like `strlen' but searches only a given maximum
3181 number of characters for the null terminator. `stpncpy', `strndup' and
3182 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3185 * New function `statfs' in header <sys/statfs.h>.
3187 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3188 provide convenient functions for operating on blocks of null-terminated
3191 * A new suite of functions in <utmp.h> handle all the details of reading
3192 and writing the utmp file.
3194 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3197 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3198 completely POSIX compliant and also implemented the extended functionality
3199 to handle alternate digit representation and alternate era date formats.
3201 * Ulrich Drepper provided an implementation of the `strptime' function
3202 defined in XPG4.2 which transforms a string into a `struct tm' value.
3204 * Paul Eggert provided the tzselect shell script as part of the timezone
3205 code. The shell script makes it easy to select the correct timezone
3208 * The implementation of the malloc family of functions is completely replaced
3209 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3210 The implementation uses the mmap function (if available) and it is
3211 optimized for the use in multi threaded programs.
3213 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3214 functions. This new functionality is usable by specifying a special
3215 salt string and it is compatible with implementation on *BSD systems.
3217 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3218 `getsubopt' to handle second level command line options, `bsd_signal'
3219 to access BSD style `signal' functionality, the obsolete `regexp' style
3222 * the `lchown' function is available on system which support this
3225 * The implementation of the shadow password handling function was contributed
3228 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3230 * POSIX.1g support was added. The <sys/select.h> header is available,
3231 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3232 implementation of `getaddrinfo'.
3236 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3238 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3239 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3241 * The new function `daemon' from 4.4 BSD is useful for server programs that
3242 want to put themselves in the background.
3244 * Joel Sherrill has contributed support for several standalone boards that
3245 run without an operating system.
3247 * `printf', `scanf' and friends now accept a `q' type modifier for long
3248 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3250 * All of the code taken from BSD (notably most of the math and networking
3251 routines) has been updated from the BSD 4.4-Lite release.
3253 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3255 * The new functions `getdomainname' and `setdomainname' fetch or change the
3256 YP/NIS domain name. These are system calls which exist on systems which
3259 * The time zone data files have been updated for the latest international
3262 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3263 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3267 * The C library now includes support for Sun RPC, from Sun's free
3268 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3269 are included. (There is still no support for YP.)
3271 * Tom Quinn has contributed a port of the C library to SGI machines running
3272 Irix 4 (mips-sgi-irix4).
3274 * The new `lockf' function is a simplified interface to the locking
3275 facilities of `fcntl', included for compatibility.
3277 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3279 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3281 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3284 * The error message printed by `assert' for a failed assertion now includes
3285 the name of the program (if using GNU ld) and the name of the calling
3286 function (with versions of GCC that support this).
3288 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3290 * The library now includes the <sys/mman.h> header file and memory
3291 management functions `mmap', `munmap', `mprotect', `msync', and
3292 `madvise', on systems that support those facilities.
3294 * The interface for `mcheck' has changed slightly: the function called to
3295 abort the program when an allocation inconsistency is detected now takes
3296 an argument that indicates the type of failure. The new function
3297 `mprobe' lets you request a consistency check for a particular block at
3298 any time (checks are normally done only when you call `free' or `realloc'
3301 * It is now possible to easily cross-compile the C library, building on one
3302 system a library to run on another machine and/or operating system. All
3303 you need to do is set the variable `HOST_CC' in `configparms' to the
3304 native compiler for programs to run on the machine you are building on (a
3305 few generator programs are used on Unix systems); set `CC' to the
3308 * The new function `fexecve' (only implemented on the GNU system) executes
3309 a program file given a file descriptor already open on the file.
3313 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3314 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3316 * You can set the variable `libprefix' in `configparms' to specify a prefix
3317 to be prepended to installed library files; this makes it easy to install
3318 the GNU C library to be linked as `-lgnuc' or whatever.
3320 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3321 copies a limited number of characters from a string, and returns the
3322 address of the last character written.
3324 * You no longer need to check for whether the installed `stddef.h' is
3325 compatible with the GNU C library. configure now checks for you.
3327 * You can now define a per-stream `fileno' function to convert the
3328 stream's cookie into an integral file descriptor.
3330 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3331 allocates zero bytes of storage, and returns a unique pointer which
3332 you can pass to `realloc' or `free'. The behavior is undefined if
3333 you dereference this pointer.
3335 * The C library now runs on Sony NEWS m68k machines running either
3336 NewsOS 3 or NewsOS 4.
3338 * The new `syscall' function is a system-dependent primitive function
3339 for invoking system calls. It has the canonical behavior on Unix
3340 systems, including unreliable return values for some calls (such as
3341 `pipe', `fork' and `getppid').
3343 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3344 to `EAGAIN', which is the preferred name. On systems whose kernels
3345 use two distinct codes, the C library now translates EWOULDBLOCK to
3346 EAGAIN in every system call function.
3350 * The GNU C Library Reference Manual is now distributed with the library.
3351 `make dvi' will produce a DVI file of the printed manual.
3352 `make info' will produce Info files that you can read on line using C-h i
3353 in Emacs or the `info' program.
3354 Please send comments on the manual to bug-glibc-manual@gnu.org.
3356 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3358 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3360 * Jason Merrill has contributed a port to the Sequent Symmetry running
3361 Dynix version 3 (i386-sequent-dynix).
3363 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3364 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3366 * New function `memory_warnings' lets you arrange to get warnings when
3367 malloc is running out of memory to allocate, like Emacs gives you.
3369 * The C library now contains the relocating allocator used in Emacs 19 for
3370 its editing buffers. This allocator (ralloc) minimizes allocation
3371 overhead and fragmentation by moving allocated regions around whenever it
3372 needs to. You always refer to a ralloc'd region with a "handle" (a
3373 pointer to a pointer--an object of type `void **').
3375 * There is a new `printf' format: `%m' gives you the string corresponding
3376 to the error code in `errno'.
3378 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3379 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3380 pass, the `a' modifier says to fill in a `char **' you pass with a
3383 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3384 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3385 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3387 * `mkstemp' is a traditional Unix function to atomically create and open a
3388 uniquely-named temporary file.
3392 * The standard location for the file that says what the local timezone is
3393 has changed again. It is now `/usr/local/etc/localtime' (or more
3394 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3396 * The distribution no longer contains any files with names longer than 14
3399 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3400 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3402 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3406 * The configuration process has changed quite a bit. The `configure'
3407 script is now used just like the configuration scripts for other GNU
3408 packages. The `sysdeps' directory hierarchy is much rearranged.
3409 The file `INSTALL' explains the new scheme in detail.
3411 * The header files no longer need to be processed into ANSI C and
3412 traditional C versions. There is just one set of files to install, and
3413 it will work with ANSI or old C compilers (including `gcc -traditional').
3415 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3416 MIPS DECStation running Ultrix 4.
3418 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3419 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3420 made itself into a shared library.
3422 * Yet further improved support for the i386, running 4.3 BSD-like systems
3423 (such as Mach 3 with the Unix single-server), or System V.
3425 * New function `strncasecmp' to do case-insensitive string comparison
3426 with limited length.
3428 * New function `strsep' is a reentrant alternative to `strtok'.
3430 * New functions `scandir' and `alphasort' for searching directories.
3432 * New function `setenv' is a better interface to `putenv'.
3434 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3435 function for traversing a directory tree.
3437 * The GNU obstack package is now also part of the C library.
3438 The new function `open_obstack_stream' creates a stdio stream that
3439 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3440 formatted output directly to an obstack.
3442 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3443 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3445 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3447 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3448 things to your strings.
3450 * There are some new test programs: test-fseek, testmb, and testrand.
3452 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3453 These ports are not finished, but are a good starting place for really
3454 supporting those systems.
3456 * `/etc/localtime' is now the standard location for the file that says what
3457 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3458 This follows the general principle that `/etc' is the place for all local
3459 configuration files.
3461 * The C library header files now use `extern "C"' when used by the C++
3462 compiler, so the C library should now work with C++ code.
3464 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3465 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3468 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3469 function which uses the `merge sort' algorithm, and is said to be
3470 significantly faster than the old GNU `qsort' function. Merge sort is
3471 now the standard `qsort' function. The new algorithm can require a lot
3472 of temporary storage; so, the old sorting function is called when the
3473 required storage is not available.
3475 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3476 provides the Unix `crypt' function, plus some other entry points.
3478 * The code and header files taken from 4.4 BSD have been updated with the
3479 latest files released from Berkeley.
3481 ----------------------------------------------------------------------
3482 Copyright information:
3484 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3486 Permission is granted to anyone to make or distribute verbatim copies
3487 of this document as received, in any medium, provided that the
3488 copyright notice and this permission notice are preserved,
3489 thus giving the recipient permission to redistribute in turn.
3491 Permission is granted to distribute modified versions
3492 of this document, or of portions of it,
3493 under the above conditions, provided also that they
3494 carry prominent notices stating who last changed them.
3497 version-control: never